24-hour ambulatory study of duodenal pH.
Kerrigan
D
D
Bird
N
N
Johnson
A
A
D004381:Duodenal Ulcer / Q000378:metabolism*; D004566:Electrodes; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods